Why carry two fasteners when one can do both jobs? The Large Oval Head Torx Self-Drilling Chipboard Concrete Screw is engineered for professional carpenters who need to jump from chipboard flooring straight into concrete or brick without swapping bits or screws. The 22 mm oval head gives a decorative, over-sized footprint that hides slight mis-alignment, while the twin-lead thread, hardened drill point and body knurling deliver lightning-fast installation and anti-split protection in every material you meet on site.

Place of Origin	Jiaxing, Zhejiang, China
Dimension	6mm, 8mm, 10mm,12mm
Surfance	/HDG/zinc plated/white/yellow
Material	Carbon steel
Standard	DIN, AISI, ASME, ISO
Non-standards	OEM is available, according to drawing or samples
Samples	Samples are free.
Package	Pack the box first and put it in the carton, or according to customers' requirement.
Payment	T/T or L/C

Packaging & Shipping

Standard export packing or According to customer's requirement

Our Services

1.We^,ll always be online whenever you look for us.

2.The customer is god, and we always focus on the customer's point of view

3.We produce your order strictly by your request. If the quality was not acceptable, we will refund to you.

FAQ

Q:What is your main products?

A:Fasteners, Bolt, nut, screws, washer, threaded rod, anchors, self tapping screws, self driling screws, stainless steel plate, etc.

Q: What is your delivery time?

A:It depends on if we have stock or not, if we have stock goods, we can delivery within 2 days after receive the payment. And normally our production is in 20-30 days for one container (20-26 ton) products.

Size range: 4.5 × 40 mm – 6.0 × 120 mm (other lengths on request)
Head: Large oval (mushroom) Ø 12 mm × H 4 mm – seats flush or slight dome for visual accent
Drive: Torx T25 / T30 – deep six-lobe recess transmits 40 % more torque than PZ2, zero cam-out
Thread: Dual-profile – 2.5 mm pitch wood zone + 1.4 mm high-low concrete zone for maximum pull-out
Point: Hardened carbon steel #3 drill point (950 HV) – pierces 6-20 mm chipboard + 25 MPa concrete without hammer drill
Knurling: 3 under-head knurled rings ream clearance hole, prevent particleboard jacking & reduce torque spike
Coating: Zinc-yellow Cr(VI)-free 8 µm + top-coat wax – 48 h neutral-salt-spray, suitable for dry & covered outdoor use
Strength: Core hardness 320 HV, surface 550 HV – single-shear 1.8 kN in C20 concrete
Standards: ETA-11/0030 for concrete, EN 14592 for timber, CE & REACH compliant

Hybrid hero: Fastens 18 mm chipboard straight to concrete, brick, block or steel subfloor in one pass
Speed mount: Self-drilling point eliminates switch-out to masonry bit – saves 30 % install time
Split shield: Knurling reams clearance, prevents bulging or core-crush in particleboard
Oval elegance: Large head covers V-grooves, screw slots and minor layout errors – perfect for visible furniture & stair treads
Torx torque: T25/T30 drive seats screw full-depth without wobble or bit wear (lab rated 15 000 cycles)

Bulk: 1 000 pcs / 8 kg carton, 36 carton pallet (EURO 800×1200)
Trade: 200 pcs / heavy-duty resealable tub with T25 driver bit
Retail: 50 pcs / hang-sell blister, barcode & QR install video
Custom: Colour-matched heads (white, grey, black), bulk bags, contractor kits from 5 000 pcs MOQ

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ABOUT US

Jiaxing Goshen Hardware CO., LTD is Located at Economic Development Area, Jiaxing City, Zhejiang Province, China. We specialise in suppling kinds of stainless steel, high strength and low carbon steel fasteners with excellent quality and reliable price. Our fasteners according to a number of internationally recognised standards including DIN, ANSI/ASTM, BS, JIS, GB etc.